Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 25 - Baseband systems
Patents for H04L 25 - Baseband systems (55,083)
10/1981
10/28/1981EP0038435A1 Regenerator for digital signals
10/27/1981US4297595 Signal regenerating circuit with improved input-output isolation
10/27/1981US4297567 Apparatus for receiving storing and outputting digital signal sequences
10/20/1981US4296493 Method of and arrangement for regenerating start-stop signals
10/20/1981US4296477 Register device for transmission of data having two data ranks one of which receives data only when the other is full
10/13/1981US4295124 Communication method and system
10/13/1981CA1110766A1 Digital signal transmitter/receiver system including programmable self-test capability
10/07/1981EP0037260A2 Data regenerative system for NRZ mode signals
10/06/1981US4293952 Sampling function type equalizer
10/06/1981US4293949 Clock invariant synchronization for random binary sequences
10/06/1981US4293947 Information handling system
09/1981
09/30/1981EP0036605A1 PCM system with transmitter side scrambler and receiver side descrambler
09/30/1981EP0036596A1 Device for the interleaving of the writing and reading times of information in a memory of a synchronization unit
09/29/1981US4292626 Manchester decoder
09/29/1981US4292593 Method of demodulating a quadphase coded data signal and receiver for carrying out the method
09/29/1981US4292551 Optoelectronic coupling device for transmitting DC signals
09/29/1981US4292466 Circuit arrangement for receiving unipolar DC signals
09/23/1981EP0036084A1 Process and device for the control of the initial adjustment of the clock of a receiver for synchronous data
09/17/1981WO1981002653A1 Adaptive decision level circuit
09/16/1981EP0035674A1 Switchable free running scrambler and descrambler arrangement
09/15/1981US4290139 Synchronization of a data communication receiver with a received signal
09/15/1981US4289976 Circuit arrangement for the transmission of digital data
09/15/1981CA1109167A1 Time assignment speech interpolation communication system with variable delays
09/09/1981EP0035434A1 Transmitting and receiving device for the transmission of digital signals
09/08/1981US4288873 Analogue to digital converters
09/08/1981US4288872 Equalizer for the correction of digital signals
09/08/1981US4288869 Half-duplex/simplex digital signal converter
09/08/1981US4288664 Neutralization signal developing device for an echo suppressor
09/08/1981CA1108767A1 Apparatus and method for detecting errors in a 7- level correlative signal
09/08/1981CA1108709A1 Apparatus for digital data recovery from mass storage devices
09/08/1981CA1108707A1 Auto-adaptative equalizer
09/02/1981EP0034833A1 Pulse regenerator for a regenerative repeater
09/01/1981US4287596 Data recovery system for use with a high speed serial link between two subsystems in a data processing system
09/01/1981US4287469 Process and circuit arrangement for the measuring of coefficients of message-transmission equipment
08/1981
08/26/1981EP0034467A1 Receivers suitable for use in remotely-operable switching devices and data transmission systems
08/25/1981US4286333 Data transmission
08/25/1981CA1107869A1 Methods and apparatus for rejection of interference in a digital communications system
08/25/1981CA1107822A1 System and method of modulation and demodulation for optical fibre digital transmission
08/19/1981EP0034055A2 Variable window data recovery apparatus and method
08/19/1981EP0033811A1 Method of compressing signalling information transmitted in a multiplexed digital PCM information stream
08/18/1981US4285045 Delay circuit
08/18/1981US4284953 Character framing circuit
08/18/1981US4284843 Repeating station for use in digital data communications link
08/12/1981EP0033665A1 Data communication system
08/11/1981US4283789 Data transmission method and devices for practicing said method
08/11/1981US4283788 Equalization system with preshaping filter
08/05/1981EP0032992A1 Circuit for interfacing a half-duplex digital data line with a simplex transmitting and a simplex receiving line, and vice-versa
08/04/1981US4282604 Optical isolation circuit for bidirectional communication lines
08/04/1981US4282601 Three level data transmission system having means for seeking a constant average value for the transmitted signals
08/04/1981US4282512 Data communication system
08/04/1981CA1106502A1 Automatic clock phase adjustment method and circuit
07/1981
07/29/1981EP0032522A1 Adaptive equalization device
07/28/1981US4281292 Sampling system for decoding biphase-coded data messages
07/28/1981US4281291 Arrangement for detecting the binary values of bit cells having center transitions subject to phase distortion
07/28/1981CA1106065A1 Data transmission systems
07/21/1981US4280221 Digital data communication system
07/21/1981CA1105586A1 Digital data transmission arrangement
07/14/1981US4278992 PCM Detector for video reproducer apparatus
07/14/1981CA1105144A1 Bit error detecting circuit for use in a digital signal transmission line
07/07/1981CA1104694A1 Method and apparatus for regenerating a modified duobinary signal
07/07/1981CA1104693A1 Modified duobinary repeatered span line
07/07/1981CA1104662A1 Signal generator for producing signals for a remote control
06/1981
06/30/1981US4276656 Apparatus and method for replacement of a parallel, computer-to-peripheral wire link with a serial optical link
06/30/1981US4276650 Method of synchronizing a quadphase receiver and clock synchronization device for carrying out the method
06/30/1981US4276649 Receiver for digital signals in line code
06/30/1981US4276641 Method and apparatus for converting time-division data signals received on an incoming trunk to time-division data signals of different format for transmission over an outgoing trunk
06/30/1981US4276640 Noise tolerant multiplex system
06/24/1981EP0030724A2 Method and device for carrying out objective measurements on digital speech transmission systems
06/23/1981US4275457 Apparatus and method for receiving digital data at a first rate and outputting the data at a different rate
06/23/1981US4275416 PCM Detector
06/23/1981CA1103775A1 Hybrid for two-wire full-duplex transmission of digital signals
06/16/1981CA1103356A1 Method of decoding waveforms
06/11/1981WO1981001637A1 Data processing system with serial data transmission between subsystems
06/10/1981EP0030095A1 Bus transmission system
06/09/1981US4272758 Arrangement for providing a power supply and transmitting electrical signs between two devices using a small number of contacts
06/09/1981CA1102916A1 Sync pattern encoding system for run-length limited codes
06/03/1981EP0029688A1 Digital data transmission systems
06/02/1981US4271526 Three-level, self-clocked data transmission system
06/02/1981US4271514 Loopback test for data transmission paths
06/02/1981US4271403 Coaxial cable switching circuit
06/02/1981CA1102424A1 Digital communication system for transmitting digital information between a central station and a number of remote stations
05/1981
05/27/1981EP0029108A1 Method and arrangement for fault location without addressing forming loops in a communication line
05/26/1981US4270208 Threshold generator
05/26/1981US4270205 Serial line communication system
05/26/1981US4270179 Complex ternary correlator and method for adaptive gradient computation
05/20/1981EP0028734A1 Device for adjusting an equalizer in a data signal-transmission equipment
05/20/1981EP0028706A2 Device for the automatic equalization of electric data transmission paths
05/19/1981CA1101517A1 Method and an arrangement in a teleprinter equipment
05/13/1981EP0028551A1 Memorizing comparator for regenerating digital electrical signals and digital transmission system using such a comparator
05/13/1981EP0028405A2 Method and arrangement for reducing jitter during block transcoding of digital signals
05/13/1981EP0028298A2 Method for the transmission of digital signals by means of a signal generator
05/12/1981US4267595 AMI Decoder apparatus
05/12/1981US4267515 Distortion factor meter circuit
05/12/1981CA1101082A1 Apparatus and method for timing recovery from a pseudo-ternary signal
05/12/1981CA1101078A1 Discrete fourier transform equalizer and method
05/12/1981CA1101074A1 System for transmitting service communications
04/1981
04/30/1981WO1981001226A1 Self synchronizing clock derivation circuit for double frequency encoded digital data
04/30/1981WO1981001225A1 Clock derivation circuit for double frequency encoded serial digital data
04/29/1981EP0027547A1 Data signal detection apparatus
04/28/1981US4264973 Circuitry for transmitting clock information with pulse signals and for recovering such clock information
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